Grinder head for assembled pistons



' H. c. STARKE GRINDEB HEAD FOR ASSEMBLED PISTONS Filed Nov. 4,L 1922JM), ATTORNEY NINVENTOR. SQ' /YSWRYGGTJQRKE Y .n @N w k m m v im bm, wQN m a, n@ www Nw i WITNEe: 840.13m

' May 27, 1924. 1,495,451

H. C. STARKE GR'LRDER HEAD FOR ASSEMBLED PISTONS Filed Nov. 4, 1922 2Sheets-Sheet 2 4 INVENToR.

Ham?? C. STA/RXE ggylTToRA/*EY f Y HENRY-cremanlm, or- LosfANGE'LEs,CALIFORNIA... 1

GRINDER ifrnAn ron-ASSMBLEDESOiis., ,l i

new and useful Grinder Head for Asselin-'fl ','AAyfeatiire'ofith'eini'z'entio'n inclulestheVVT elcledl Ristons.: of which"thefollowing alliiieain'sivherelojthe newlyinvntedfgrinder y, speciiicationwwv. yisrnadfatt'aehable'ft th-eliandi'sgrinder y, l VVAn object `o-f` this`invention to "iirnrifcleV lijeadihoisi'ng"andithis"res1hctlan object 10means Wherebyfapiston' connected vafconof the inif-ztiony is'to''nfakeproiisio'n Where- 65 l n ecting rod lInalvbe perfectlygroiindsdtliatthyvhn the invention i'ssed conne'ctior'" when it, is assemblee-l with.,thelcgrliiifler'andm the ,Landis )grinder "hea'd'fhousinglft'he v.Crankshat'ofwan engineiit"Willfheper-` pistonJ'ass'enihlecll vwiththe'cionnectng' rod I`fectlytruely 'i y 'l andcbnnctinlq'rdbearingcan'he osi'fllated wpioneer invthatvIprovidein,awgiintliert head uitsflfeltg's" thatfil'ieiiitisdesired;"the for,assemhledwpistonsjythreealinedbea'ringsl'pistoiihead'inay'lie 'ground 'tofgive clear- '6.9support thealnecl piston Lheaclandcon .ance 'o'r thelvvr'is't'pin'ff*2"* nuectingurocl; one of saiclvhearings4 beingV"Otherobectsadifantages'and'ifatures of 20 external lathe :center toiengage angl 'siijport inventionmay appear from thela'c'co'nip'any-'..thehcloecl endt ofthe ypiston heal; another iiigi"drawiiiga"tliesnb'jinetl detail dscrip being an. internalycentering'siiplo'rtfor thee tion andthe appended claims". f

pStOnhead; andthe third being Van eiter!l lg drawings{illustrate} ,Theacompaa nal ,centering4 support4 for the"crankshaft"thehentionl' n f..25 `bearing of. the connecting roclancl ffljiro-z "'Finre 1n isalrag'rn'ent'al longitudinal?'sec- 80 l( vide means llfor adjilstinzgltlieweuxtrnallisf tional elevation of nyfinventionHappliedto ton headcenter andv5 Itheexternal'centering L'anlisfgrinderfheadhovu's'in'gf'andshowl support for therank ,shaftbe'aring ofthe ing 'ai''con'necting4 "rodrwrist'lpin, "anclthe Y connecting rod so -thatthefjist'o'iianl cdnfragnienofa'pistong'in' position for grindv Ut..

center and 1the crank shaft`hearing'ceiit'erinat'ically'indicate'anerieryniheeh ing means; and theApiston head 'is clalrniech Fi'g'l is' `an"enlarged fragmentl olffsaidybetween y,theulathe centeraiicl .thet :ilternal' section at Ithepart'se't oiil'by linefzfFigJ-l.

piston head centerings'rifp'ijiort'. l 'fFigf'f isan" enlargedlr'agmentw'f Vsaid ""35 Preferably thensuiv port- 'liorwtlieAA:crank...sec/tion'setfoflloy'linefma Figli" "-f-"f 90 `shaft hearing ofthe connectingilhas a Figfl is a"'p`lan"'yiew"partly insection" conicalconcaire `lieaclfthe .inside Walls of'showingsiich parts `of^fthisinvention? towhich :engager the' said crankshaft Agetlie'rf'with'alc'onne'c'ti'ng r'oclfand itsA bean i ,bflilllgy.andy the linternalsuppnofrftfrthe ing and awt/rist A`pin a'nd"the fragment of a Y :ficIopenyend of the piston'heacl'is conical::sk'ifas 'J iiiston, inpositi"ri^or Iturningt-hefpiston in 95 to centerthe pistonhead.;Atheffconcaveand' Y lathe 'p'ri'or'hb''gfrind'ir'i'g."y y: =.--'\f.-.-r'f conicalv supports heinl'g` co-arial` Withmthe" li`igg'm5'-fis'an`enl'argedel'evatidii showing lathe center and the axisof rotation' ofthethpistonhead andwrist pin in `section'on A ,three centers.. A line',Fiel"1"`tvith"ceterngsupport@and .,Afnrtlher object. ofthefinifention'is ease with the driving pins in position for revolv-.100 Vanal accuracy of acljiisting the rasseibleclming" the "pistoni1"There ijsalsofshoivvnl a rod piston head r andi connecting rod"`i""the"tlathafloe ns'eilfo'r turning thepistonfwhen;.Qlrllir-1glllieacln.,.4 "1 "l` gritlin'gfor Wristpin'clearance';Dot'fancl y l ,Another object'isfto egclude'tlnst'arilfclirt,y (lashrlinesl indicate nanual rnans'viforl rockma fromV the revolving bearingsthe rgriififlerffingftheleisten leacl to grind Wrist =pin"clea1- 105head. s v, A" furthery object isft iriake jrovisi'oi "for i Fig. Gis' an'end fviewof the centering pisgrinding the wristpin' clearance ofthe`vpis-- ton' h'acl support'tHrnelHhaI 'Way-round tondheadflbyhandhafterftle inainfgrindihg frein 'thepositionshownin AFig."5;omitting'Wahbgn.@QmletiQQ., i N110 Fig. 7 is a detail of the piston headcentering support and the piston head driving pin.

Fig. 8 is an enlarged view partly in cross section on line S, Fig. l,showingbolts, and the connecting` rod crank shaft bearing centering`support in position and omitting the connecting rod.

Fig. 9 is an enlarsied view partly in cross section on line aq, Fig'. lshowing the pulley and the driving; pin in position against the clampcollar for drivingrthe'assembled piston support when used on grinders.

The iframe l. shown in Fig. l, or l shown in Fig. 4, maybe the trameoil' a Landis grinder headj or ot any usualg'rinder head provided with aseatl or extension 2 in which the hollow arbor vSis journaiied, and uponwhich is mounted the pulley 4 which is revolved by the belt .4 connectedto any suitable source oiY power.

The frame l is provided with a grinder head comprising a stationarybeari'ug `in the Jform oi a housingwhich vis secured to said frame bymeans of thebolts 5. A, revolving' bearing and guide is journalled at 7to the stationaryhbearing 5? and made close fitting by annular taperedbronZebushings 8 and 9.

IThe revolving bearing and guide is provided at its outer end with Varemovable internal'piston head center l() .for the open end 10 of apiston head l5. A revolving connecting rod internal centering` supportor bearing,` '1l is slidably mounted insaid revolving bearing and has aconical cavity l2 that forms the centering means and bearing for thecrank shaft 'bearing 13 oi' the connectingrod 'i4 when the piston l5contacts with the removable piston center l0. Said connecting rod center'llis rotatably mounted on the adjusting rod 18 and is yieldingly heldtoward the 4internal piston head center 10 by means ot a springl 'th atoperates between the shoulder i7 on the adjustine` rod l8'and theconnecting;` rod ccnter l1. A nut 17 screwed on theii'iner end ot saidrod 18 serves as a stop to retain the connecting rod center il on theadjusting; rod 18, and which rod extends axially through the hollowarbor and is adjustable by means ofi a thread l5) engagr ing a nut 2Oheld by a drive tit in the hollow arbor The bushing 19 held by a drivefit in the inner end oi the hollow arbor 3 serves las a bearing tor therod v18 and maintains said rod in aXial alinement.

The hollow arbor is secured'inthe seat 2 by the taper bearing 2l whichis secured to the' arbor 3 by means ot the l-ey 22` The outer end oitthe taper bearing; .2l is threadedas at 28 to receive`the adjusting nutn24 that is adapted to be adjusted o n the taper bearing 21 and toContact with the trame l to position the taper 2]. in its seat; suchadjustment is adapted to take up wear of the taper bearing' and arbor. Alock nut 25 threaded on the arbor 8 locks the adjust-- ing nut inadjusted position and retains the varbor and taper bearing in adjustedposition.

A hand wheel 2G is secured to the adjusting rod 18 by the key 2T and thenut 28 retains the key in position.

The reif'olving` bearing` support and grinder 6 is secured to the endplate 29 that is adjustably mounted on the arbor S'. il lock nut in theform oi' a split collar is threaded on the left hand threaded portionSlot the arbor 3 and is clamped there on by means ot the bolt Thisconstruction affords means to take up wear ou the annular taperedhronzebusliings 8. 9. The bushings 8, 9 have a drive or press tit withthe guide 6 and vstationary support 5 rey spectively and the inner endof" the bushing) engages the shoulder 8 3 in the stationary bearing 5,that form a stop for the bushing 9 so that as the bearing is adjusted onthe arbor 3 the bushing 8 vwill be adjusted accordingly. The packing isiuterposed between the bushings 8, 9 and the cover 36 that is screwthreaded ontothe stationary bearing 5. to prevent grindines and waterfrom entering the Yframe l.

The stationary bearing@ and associated parts kare driven in thedirection ot the arrow, lF l, by the pin 8T which is secured to thepulley 4 and en ejagesvthe es:- tensions 38 ot the collar 89 that islocked in engagement with the ,threaded portion 3l of the arbor 3 by thebolt 40. ,he outer end of said support is provided with an inwardlyextending` pin 4l which lentf (fes one side of a slot. 42 `that extendstrom the central oritlce 43 inthe removable center l0. to the peripheryof said center l0.

Said center 10 is providedatits outer cud with a tapered surface 44which is adapted to engage the open edge ojt `,he piston head l5 andalines the piston (fo-.axially with the connecting; rod center ll andthe external 4lathe center 45 that is adapted to pivotally engage theclosed end ot the pistonhead and `that is adjustably mounted in theusual support 46 which is adjustable longitudinally on the bed 47 ot theiframe Il as is nell known in the art. y

The tapered surface 4f" ot the .removable center l0 may be made in4various sandard diameters to accommodate various six/,ed pistons. Adriving arm 48 is secured in tht` outer end of the removable center 10and is adapted to ,engage the wrist pin bearimgn 49 and rotate' thepiston head when said center 1 0 is rotatedby the pin 4l.

ln Fig. 4 I have shown the device adapted for mountingon a lathe. Ahollow lathe spindle 50 is provided in place of; the hollow arbor 3 andis adapted tombe inserted in the spindle head of any standard lathe, Thenut 51 draws the shoulder 5:2 against the spindle head, and securelylocks vthe spindle therein, thus permitting a roughing cut to be takenon the lathe before iuishing the piston head on the grinder.y

In practicaloperation the piston head 15 with the connecting. rod 14assembled therein by means of the wrist pin 53 seated in the wrist pinbearing 49 may be ground by removing the internal center from thestationary bearing 6 and inserting the connecting rod 14 through theslot 4Q; and then mounting the center 10y in the stationary bearing 6.The lathe center 45 is adjusted to engage the closed end oit the pistonhead 15 so that such piston head is clamped or centered between thelathe center and the internal piston head support 10. The connecting rodcenter 11 is kthen adjusted to engage the crank shaft bearing andtheconical concave head ot said connecting rod center will aline theconnecting rod 14 co-axially with the connecting rod center 11, theinternal centering support for the piston head, and the external lathecenter which engages the closed end of the piston head.

The pulley 4 is rotated by means of the belt 4 connected with anysuitable source of power and the pin 37 engages the extensions 38, ofthe collar 39 and rotates the hollow arbor 3 and the bearing support 6,the inwardly extending pin 41 engages one side of the slot 42 androtates the removable center 1() until the driving arm 48 en` gages thewrist pin bearing 49 to rotate the piston head cosaxially with the lathecenter 45. The emery wheel a, shown in dotted lines Fig. 1 is rotated inthe direction of the dotted arrow by any suitable mechanism not shown,and is adapted to grind the piston head 15.

Then it is desired to grind the wrist pin clearance on the piston head,a stick or rod 7J, Fig. 5, inserted in the wrist pin 53 may be used tooscillate the piston head in a manner well known in the art. Theextensions 38 of the collar 39 will not engage the pin 37 during suchoscillation and it is thus seen that guide 6, piston head bearing 10,and the piston head 15 may be turned in a reverse direction practicallya full revolution.

I claim.

1. A grinder head for assembled pistons comprising three alined bearingsto support the alined piston head and connecting rod, one of saidbearings being an external lathe center to engage and support the closedend of the piston head; another being an internal centering support forthe piston head, and the third being an external centering support Jforthe crank shaft bearing of the connecting rod; and vmeans for revolvingsaid internal centering support tov rotate the piston head, f

2. In a device of the character set torth, a` revolving Aexternalbearing 'for a connect ing rod bearing; a= revolving bearing and guidesfor said external bearing; means 'for yieldingly adjusting said externalbearing along said guide; a piston head ,bearing on the end of saidguide and means on said guide to engage the piston head bearing to causethe same to rotate with the guide.

3. In a device of the character set tor-th, a stationary support; aguide journalled in said support; means insaid guide toyieldinglysupport andcenter a connecting rod bearing; means 0n one end of saidlguide to engage and center the open end o'fa f piston head and adaptedto be rotated by said guide; means to engage and center the closed endof said piston head; and means vengaging said piston head to rotate saidpiston head simultaneously with the guide.

'4. A grinder head for assembled/pistons comprising in combination witha trame having an extension thereon; and a lathe center; an arborjournalled in said extension; a stationary support secured to saidframe; a guidev journalled in said support and connected to said arbor;a bearing for a connecting rod bearing adjustably mounted in said guide;a piston head centering bearing on said guide and adapted to clamp apiston head between itsend and said lathe center; a pulley mounted onsaid extension; means contacting with said pulley for rotating saidarbor; and means connected to said piston head bearing to rotate saidpiston for the purpose set forth.

5. A grinder head` for assembled pistons comprising in combination witha frame and a lathe center; a stationary support secured to said frame;a guide journalled in said support; a bearing for a connectingrodbearing adjustably mounted in said guide; a piston head bearingremovably mounted on the end of said guide and adapted to clamp a pistonhead. between its end and said lathe center; and means to rotate saidguide and piston head bearing.

6. A grinder head for assembled pistons comprising in combination with aframe and a lathe center; a stationary support `secured to said frame; aguide journalled in said support; a bearing for a connecting rod bearingadjustably mounted in said guide; a piston head bearing removablymounted on the end of said guide and adapted to clamp a piston headbetween its end and said lathe center; means to rotate said guide andpiston head bearing; and means secured to said piston head bearing toengage and rotate the piston head.

7. A grinder head for assembled pistons comprising in combination with aframe and a lathe center, a hollow arbor journalled in said frame; astationary support secured to Said, frame; a guide journalled in saidsupportY and securedto saidhollow arbor; Jneans, insaid guidegnnieansvfor .adjusting means mounted in said guide and adapted to Center aconnecting rod bearing; .means oonnected to said centering` means andextending through said hollow arbor and adapted to adjust said centeringineans longitudinallv in said guide; means for rotating said arbor andsaid guide; and means reinovably `mounted in said guide adapted toreceive a connecting rod assembled to a piston head and to hold saidpiston head in engagement with.. he lathe center and in co-axialalinenient with said lathe center.

8. A grinder head `tor pistons having con neeting rods assembled theretocomprising; in combination with a traine and a lathe center, an arborjournalled in said frame: a stationar;7 support secured to said trarne;a guide adjust/abi)7 secured to said arbor and journalled insaidsupport, the bearing for said journal comprising tapered bushings;centering means for a connecting rod `bearing; means for adjusting .saidcentering saidrguide on said arbor to take up Wear in said taperedbushings; a piston head centen ing support removably mounted in tneouter end or0 said `guide and provided with a slot and a Central orificeadapted to receive the connectingrod7` said piston head support havingVa tapered surface adapted to engage and center a piston head betweensaid suriiaoe and said lathe center; a driving arin secured to saidpiston head i support and adapted to engage the Wrist pin bearing of apiston head to rota-te said piston head; means secured to said guide andadapted to engage said piston head support to rotate the saine; andmeans for rotating said arbor. c

In testimony whereof, have hereunto set my hand at Los Angeles,California7 this 30th dayo'lz October, 1922. y

, HENRY C. STARKE. `Witness:

y JAMES R. ToWNsEND.

